Stockton, IA has a population of 235 and is the 23,715th largest city in the United States. The population density is 2,164 per sq mi which is 3861% higher than the Iowa average and 2288% higher than the national average. The median age in Stockton is 31 which is approximately 19% lower than the Iowa average of 38. In Stockton, 53% of the population over 15 years of age are married, 98% speak English and 0% speak Spanish. 77% of Stockton residents were born in Iowa, 22% were born out of state, 1% were born outside of the United States and 0% were foreign born.